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Porsche flat-6 engine Flat-6 engine in an older air-cooled 911. The Porsche flat-six engine series is a line of mechanically similar, naturally aspirated and sometimes turbocharged, flat-six boxer engines, produced by Porsche for almost 60 consecutive years, since 1963.
1953–1957 1.5 L (1,498 cc) 81 kW (110 PS; 109 bhp) 117 N⋅m (86 lb⋅ft) Type 547 air-cooled, four-stroke, DOHC, eight-valve boxer flat-four (550/1500 RS); 1956–1957 1.5 L (1,498 cc) 99 kW (135 PS; 133 bhp) 145 N⋅m (107 lb⋅ft) Type 547 air-cooled, four-stroke, DOHC, eight-valve boxer flat-four (550 A/1500 RS)
The engines were air-cooled until 1999, when Porsche started using water-cooled engines. [6] Other Porsche models that use flat-six engines are the 1970–1972 Porsche 914/6 , the 1986–1993 Porsche 959 (rear-engine), and the 1996–2021 Porsche Boxster/Cayman (mid-engine).
The Type 996 introduced in 1998 represented two major changes for the venerable 911 lineage: a water-cooled flat-6 engine replaced the popular air-cooled engine used in the 911 for 34 years and the body shell received its first major re-design. Changing to a water-cooled engine was controversial with Porsche traditionalists, who noted this as ...
During the 1990s, Porsche was facing financial troubles and rumours of a proposed takeover were being spread. The signature air-cooled flat-6 of the 911 was reaching the limits of its potential as made evident by the 993. Stricter emissions regulations worldwide further forced Porsche to think of a replacement of the air-cooled unit.
The last flat-six-powered Porsche prototype was the Le Mans-winning 911 GT1-98. Since then, its prototypes have used V-4 and V-8 engines. Here's why.
All 986 and 987 Boxsters use the M96, a water-cooled, horizontally opposed ("flat"), six-cylinder engine. It was Porsche's first water-cooled non-front engine. In the Boxster, it is placed in a mid-engine layout, while in the 911, the classic rear-engine layout was used. The mid-engine layout provides a low center of gravity, a near-perfect ...
The powerplant is a sequential twin-turbocharged DOHC flat-six engine equipped with 4 valves per cylinder, fuel fed by Bosch Motronic 2.1 fuel injection with air-cooled cylinders and water-cooled heads, with a bore x stroke of 95 mm × 67 mm (3.74 in × 2.64 in) for a total displacement of 2,849 cc (173.9 cu in).
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